docs(Guides): Fix error in Getting Started

Fixes error in Getting Started Guide

Author: rpalo

src/content/guides/getting-started.md

@@ -144,7 +144,7 @@ In this setup, `index.js` explicitly requires `lodash` to be present, and binds
 With that said, let's run `npx webpack` with our script as the [entry point](/concepts/entry-points) and `bundle.js` as the [output](/concepts/output). The `npx` command, which ships with Node 8.2 or higher, runs the webpack binary (`./node_modules/.bin/webpack`) of the webpack package we installed in the beginning:
 
 ``` bash
-npx webpack src/index.js dist/bundle.js
+npx webpack src/index.js --output dist/bundle.js
 
 Hash: 857f878815ce63ad5b4f
 Version: webpack 3.9.1